Use cookies for dark mode

(also reverts most back-end changes from previous commit)

app/Http/Controllers/AccountController.php

@@ -38,7 +38,6 @@ class AccountController extends Controller
                 Rule::unique('users')->ignoreModel($user),
             ],
             'new_password' => ['nullable', 'confirmed', VALI_PASSWORD],
-            'dark_mode' => 'nullable',
         ]);
 
         if ($input->email != $user->email) {

app/Models/User.php

@@ -33,7 +33,6 @@ use MightyPork\Utils\Str;
  * @property string $email - unique, for login and social auth chaining
  * @property string $password - hashed pw
  * @property bool $confirmed - user e-mail is confirmed
- * @property bool $dark_mode - user prefers dark mode
  * @property-read Proposal[]|Collection $proposals
  * @property-read Table[]|Collection $tables
  * @property-read OAuthIdentity[]|Collection $socialIdentities
@@ -63,7 +62,7 @@ class User extends BaseModel implements
      * @var array
      */
     protected $fillable = [
-        'name', 'title', 'email', 'password', 'bio', 'website', 'confirmed', 'dark_mode'
+        'name', 'title', 'email', 'password', 'bio', 'website', 'confirmed'
     ];
 
     /**

app/helpers.php

@@ -33,7 +33,7 @@ function faker() {
 }
 
 function dark_mode() {
-    return user() !== NULL && user()->dark_mode;
+    return isset($_COOKIE["dark_mode"]);
 }
 
 /**